onTaskRemoved（）在Android 8.0 Oreo API级别26上不起作用

Question

On device with Android Oreo 8.0 (API level 26) JobService.onTaskRemoved() isn't called

• How to listen for such an event?

Code used which stopped working:

class TaskRemovalWatcherService: JobIntentService() {
    ...
    override fun onTaskRemoved(rootIntent: Intent?) {  
    //not called on Android Oreo

        super.onTaskRemoved(rootIntent);   
        onAppRemovedFromRecentApps()
    }
}

When App-Task is removed from recent apps I need to

1. Stop a process
2. Finish 2nd AppTask

if AppTasks.size = 2 and 1 task is removed from recent apps, then process is NOT killed, because 2nd AppTask still in memory.

Update:

1. when use JobIntentService.enqueueWork then right after JobIntentService.onHandleWork() JobIntentService.onDestroy() is called
2. when use JobService.schedule() throws IllegalArgumentException when schadule job without constraints.

PS The idea of checking each X seconds isTaskWasRemoved seems not a good one.

Answer 1

您可以覆盖JobService#onStop() ，然后创建一条消息并将其传递给其他服务，当该服务收到该消息时，您可以清理它的工作并杀死它。

Answer 2

The expected behavior of START_STICKY might have changed due to custom implementation by device manufacturer or due to new implementation in android Oreo

You can use JobScheduler to monitor a service lifecycle after regular interval. If service is destroyed, then you can perform your task in onDestroy() method just before service is actually being destroyed.

This will remove your dependency from onTaskremoved() method.

Please refer below question with similar problem onTaskRemoved() not getting called when Home press & kill the app